The Derfflinger class was a new approach to the construction of the German brand of battlecruisers. Considerably larger than their predecessors, they dropped the wing turret system completely and also lost the central turrets, giving them more room to accommodate boilers and turbines, but reducing the number of heavy guns from ten to eight. To make up for this, the weaponry was upgraded to the more powerful 30,5cm guns, which were also used as standard heavy gun of contemporary German dreadnoughts. Lützow has two additional 15cm guns, the only notable difference between the ships. The Derfflingers were the first battlecruisers to use the Michigan-Aufstellung, meaning that all heavy guns were set in the centre line of the ship and the upper turrets were able to fire over the lower ones. Los